Radial cultivator.



B. E'. GRANWELL & W. J. ROBERTSON. RADIAL CULTWATOP.. APPLIGATION FILEDJUNE 3, 1914.

Patented Feb. 2, 1915.

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1HE MORRIS PETER: Lu.. num-1.1mm.. wASHlNGrON, D. L

B. F. GRANWELL & W. J. ROBERTSON.

RADIAL GULTIVATOR.

APPLICATION FILED JUNE 3, 1914.

Patented Feb. 2, 1915.

THE MORRIS PETERS C0., PHOTOYLITHD.. WASHlNGroN. D. C,

UNTER@ STATES PATENT FFFCF.

BENJAMIN FRANKLIN CRANWIELL AND W'ILLIAM JAMES ROBERTSON, OF AUCKLAND,

NEW ZEALAND.

RADIAL CULTI'VATOR.

maarre.

Application filed June 3, 1914. Serial No. 842,762.

To all whom it may concern Be it known that we, BENJAMIN FRANK- LINCRANWELL and V/ILLIAM JAMES Ron- En'rsoN, citizens of the Dominion ofNew Zealand, residing at 16 Custom street, Auckland, in the ProvincialDistrict of Auckland, in the Dominion of New Zealand, have inventedcertain new and useful Improvements in l'ladial Cultivators, of whichthe following is a specification.

The invention has for its object to facilitate the cultivation of groundaround trees and near to the stems thereof. According hereto the tree isemployed as a center post, a loop at one end of the implementencircling' the stem and the cultivation being effected by rows ofopposing spreading disks, carried from a frame which is drawn around thetree by a horse or motor.

The details of our invention are illustrated in the drawings, whereinFigure 1 is a side elevation, and Fig. 2, a corresponding plan of theimplement. Fig. 3, a side sectional elevation on A-A Fig. 2. Fig. f-l, asectional plan on B-B Fig. 3. Fig. 5, a front, and Fig. 6, a rearelevation corresponding to Fig. l. Fig. 7, a cross section of the mainmember of the frame. Fig. S, a perspective elevation of the rear landwheel and adjacent parts. Fig. 9, is an end elevation of one of thespading disks used at the front end, and Fig. l0, a similar view of thespading disk used at the rear end of the implement.

The main frame 1, (a cross section of which is shown in Fig. 7) has uponits rear end a loop in two sections consisting of a semicircular jaw 2,pivoted at 3, and a similar jaw el, pivoted at 5. An operating rod 6,slides in a guide 7, upon the frame; its forward end passing into ahorizontal slot S, in the jaw 2, and having a projecting pin 9, whichworks in a vertical slot 10, in said jaw. A connecting rod 11, securedto rod 6, passes through a guide hole in the frame, has a handle 12, atits end and a notch 13, in its underside in which the frame may beengaged to hold the rod in desired position. Jaw l, is operated bysimilar parts in a similar manner by a rod let, working in guide 15. Bythe means above described either of the jaws may be opened independentlyto receive or leave a tree or both of them may be opened together. |Theunder frame 16, has the lateral arms 17 and 18 Patented Feb. 2, 1915.

upon the ends of which are bearing eyes 19 and 20, in which is revolublymounted a spindle 21, its forward end being carried in a bearing 22,swiveled on the main frame. Concave spading disks fixed upon thespindle, are correlatively of regularly diminishing diameter, eachseries resembling in form a truncated cone, and have a proportionatelylessening number of spading tines from the large disk 23 (see Fig. 9) atthe forvard end, to the smallest disk 24, (see 10) at the inner end ofthe implement. The varying diameters of the several disks is dependentupon the relative distances passed through in their travel around thetree. The corresponding concave spading disks 25 upon the other side ofthe frame are dished in opposite direction to the lirst mentioned disksand are Xed upon a spindle 26, which is journaled in bearings 80 and 81upon the ends of the arms 27 and 28 and in a swivel bearing 82, upon themain frame in the manner of the same parts just described.

The axes of the spindles are not radial with the tree but areapproximately parallel with an imaginary line drawn 'from the center ofthe tree along the middle of the frame, the spading effect of the tinesbeing thereby increased.

The forward end of the frame may be supported upon land wheels 29 and 30which revolve freely on arbors 37 and 38 respectively extending at rightangles from the lower ends of vertical spindles 41 and 51 which arelocated at opposite ends o a transverse cranked axle 31 and are turnablepivotally therein. About the middle of the axle is a toothed rack 32engaging a pinion 33 which is turnable by a cranked handle 3l wherebythe height of the trame above the ground can be regulated at will. Apawl 35 pivoted at 36 and operable by a handle 37 engages the teeth ot'the pinion to maintain the rack in the desired position. Spindle @l1passes through a pair of guide eyes 4:2 in the main frame. A spindle -13parallel with and connected at the top to spindle Ll1, and having an eye43 fitting upon the arbor 37, passes through a coupling arm 44 freelymounted on spindle 41 and located in a slot 239 between said eyes and tothe outer end of which is attached the draw bar l5 and a draft chain i6leading to a draw arm t7 pivoted to near the rear end of the frame.

An extension 48 from arm 44 is connected by a cranked rod 49 with acoupling arm 50 located in a slot 50a between a pair of guide eyes 52upon the end of the trame and mounted upon and projecting rearwardlyfrom the vertical spindle 5l; which passes through said guide eyes andhas connected to its upper end and parallel with it a spindle 58 whichalso passes through the arm 50 and at its lower end has an eye 40fitting upon the arbor 88. By this means the wheels may be raised andlowered simultaneously by means oi the rack referred to, while at anyangle with the frame and will turn together in opposite directions toassume the correct angles for encircling the tree or for the travel ofthe implement when out of work, which travel will be in a directionlongitudinal with the frame. To prevent the spindles 41 and 51 slidingthrough the ends of the axle, angle brackets 54 and 55 each have an eyeiitting upon the arbors 37 and 38 respectively and an extension whichtits over the top of the aXle end. Projections 84 and 85 from therespective ends of the axle contact with the said spindles 43 and 53 andprevent the pivotal movement of the spindles 4l and 5l beyond theposition when the land wheels are at right angles to the axle tortransport purposes.

rlhe rear end ot the implement may be carried upon a land wheel 56revolubly mounted upon a spindle 57 projecting from a bracket 58slidable vertically on a rotatable spindle 59 turnable by a hand lever60 which may be fixed by passing a pin 61 into one or other ot' theholes 62 or 68 in the trame. Spindle 59 is connected to or integrallyformed with an upwardly projecting spindle 64, which is connected at itsupper end to the hand lever 60 (see Fig. 8). Bracket 58 is caused toturn with spindles 59 and 64 by a jaw 65 integral with it, whichreceives and is guided by spindle 64.

The trame 16 is of U shape (see Fig. 4) and is connected to the maintrame by bifurcated arms 66 and 67 each pivoted at one end upon a pin 68which works in slot 69, in the frame and at their other ends are pivotedupon a pin 70 in eyes 71 and 72 projecting from the under side or"Y themain frame. rlhe main frame is raised and lowered relatively to thespindles which carry the spading disks, and, the land wheel 56 isdepressible relatively to the frame so as to cause the spading disks toclear the ground for transport or other purposes, by a sliding rod 73,the rear end ot which is pivotally connected to an arm 74 (see Figs. 1and 3) pivoted at its lower end in the under frame on said pin 68 itsupper end-when desired-bearing against the under side of the main frameand supporting the same. The raising or lowering ot' the frame effectsthe sliding of the bracket 58 (and with it the vertical adjustment ofland wheel 56) by means of a bell crank lever 75 pivoted upon the pin 70and having a pin 76 at its rear end which works in holes in the innermembers of each ot' the bifurcated arms 66 and 67; at the end ot thebell crank lever is a jaw 77 which engages a recess channel 78 in thebracket 58 (see Figs. 3, 4 and 8). The sliding rod 78 has a series otlaterally projecting stud pins 79 (Fig. 3) a suitably shaped slot beingformed in the end of `the Jiranie to permit of their passage whendesired; by moving the rod laterally the metal ot the trame can be madeto engage between two ot these studs land maintain the rod in position.

rlhe height ot the trame relatively to the several land wheels ispreferably adjusted so that the spindles carrying the spading disks areat the angle which will bring the bottom edges of the spading disks inhorizontal line (see Figs. l and 6) to produce a regular depth ot tilth.

What we do claim and desire to secure by Letters Patent of the UnitedStates is l. In an implement :tor 'the purpose indicated a frame incombination with `a loop located at one end of said frame and adapted toencircle a tree, said loop being comprised ot two sections pivoted onthe frame, and rods, sliding on said trame, tor independently operatingsaid sections whereby the loop may be opened to receive and release thetree substantially as and for the purpose herein specified.

2. In an implement for the purpose indicated a. trame in combinationwith a loop located at one end of said trame and adapted to encircle atree, said loop being comprised ot two sections each pivoted upon theframe and each having a slot in which works a pin projecting from theend of an operating slide rod substantially as and for the purposeherein specified.

43. An implement ot the nature indicated wherein a frame has a loop atone end adapted to encircle a tree, two spindles arranged and locatedwith their axes approximately parallel with an imaginary radial linedrawn from .the center of said tree through the frame, and a series ofconcave spading disks carried upon said spindles, said disks graduallyand regularly increasing in size troni the inner ends of said spindlesto theouter ends thereof and the concavities of the disks upon onespindle being relatively opposite to the concavities ot' the disks onthe other spindle substantialy Vas and :tor the purpose herein specifie4. In an implement ot the nature indicated in combination a main frame,an under frame, connecting arms pivoted thereto, an arm pivoted at oneend to the under trame, a slide rod guided in said main frame 130pivotally connected to the other end of said arm which is adapted toengage the underside of the main frame, substantially as and for thepurpose herein specilied.

5. In an implement of the nature indicated a land wheel located near theinner end oit' the frame, a bracket and a spindle projecting therefromupon which said wheel is mounted, a vertical spindle upon which thebracket is slidable, a handle connected thereto, a second spindleconnected to said vertical spindle, a jaw upon the bracket engaging saidsecond spindle, a bell crank lever engaging the bracket and means foroperating said lever, substantially as and for the purpose hereinspecified.

6. In an implement of the nature indicated a land wheel located near theinner end of the frame, a bracket, a spindle projecting therefrom uponwhich the bracket is slidable, a handle connected thereto, a secondspindle connected to said vertical spindle, a jaw upon the bracketengaging said second spindle, a bell crank lever engaging the bracket, amain frame, and under frame, arms pivoted at their ends to each of saidframes and a pin at the end of the bell crank lever engaging said armswith operable means for regulating the distance apart of said frames,substantially as and for the purpose herein specified.

7. In an implement of the nature indicated, a main frame, bearing eyespivoted therein, spindles carrying spading disks, having one of theirends journaled in the respective eyes, a cranked axle, land wheels, oneupon each end thereof, guide eyes on the frame, spindles one at each endof said axle, each passing through one of said eyes, a toothed rackconnected to said axle, a pinion journaled in the main frame and engagedby said rack and a handle for turning the pinion, substantially as andfor the purpose herein specified.

S. In an implement of the nature indicated a main frame, a cranked axle,land wheels upon each end thereof, vertical guiding means at each end ofsaid axle, a

toothed rack connected to the axle, a pinion journaled in the frame andengaged by the rack, turning means for the pinion, a pawl pivoted on theframe and engaging said pinion, and, a handle for turning the pawl onits pivot, substantially as and for the purpose herein specied.

9. In an implement of the nature indicated a main frame, a transverseaxle, guide eyes in the frame, each end of the axle having a verticallymoving spindle guided by a pair of said eyes, and pivoted in the axle,an arbor formed by a cranked extension from said spindle, a land wheelupon the arbor, a second spindle connected to the top of the verticalspindle and to said arbor, a coupling arm located between said eyes andpassed through by each of said spindles and a cranked rod connecting therespective coupling arms, substantially as and for the purpose hereinspecified.

10. In an implement of the nature indicated a main frame, a transverseaxle, guide eyes in the frame, each end of the axle having a verticallymoving spindle guided by a pair of said eyes, and pivoted in the axle,an arbor formed by a cranked extension from said spindle, a land wheelupon the arbor, a second spindle connected to the top of the verticalspindle and to said arbor, a coupling arm located between said eyes andpassed through by each of said spindles, a cranked rod connecting therespective coupling arms, a draw arm pivoted near the rear end of theframe, a draw bar connected to one of the said coupling arms and a chainconnecting said draw arm to the draw bar of the implement, substantiallyas and for the purpose herein specified.

In testimony whereof we have signed our names to this speciiication inthe presence of two witnesses.

B. F. CRANIVELL. IV. J. ROBERTSON.

Witnesses:

WVM. OLIPHANT, A. L. F ERNEYHOUGH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

